Lubricating system for internal-combustion engines



E. P..DU PONT.

LUBRICATING SYSTEM FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILJED sE PT.11, 1919.

'PatentedSept. 27,1921.-

3 SHEETS-SHEET l- NYE/170R I W/r/VESS: E/ QJ/Qere Fizu/ aka/5722 E. P. DU PONT.

LUBRICATING SYSTEM FOR INTERNAL COMBUSTION ENGINES= APPLICATION FILED. SEPT. 11, 1919.

1,391,722. PatentedSept'. 27 1921.

3 SHEETS-SHEET 2- JTfOR/VE).

E. P. 'DU PONT.

LUBRICATING SYSTEM FOR INTERNAL COMBUSTION ENGiNES.

APPLICATION FILED SEPT-1111919.

Patented Se t. 27,1921..

3 SHEETS-SHEET 3..

WITNESS.

Maj-Q61 OFFICE.

ELEUTHERE PAUL m: roar, or Monster-mum, DELAWARE.

LUBRICATINGSYSTEM FOR INTERNAL-COMBUSTION ENGINES.

T 0 all whom it may. concern:

Be it known that I, ELEUTHERE PAUL DU Form, a citizen of the United States, residing at Montchanin, county ofv New Castle, 1 and State of Delaware, have invented a new ternal combustion engine, filed February 25,

1919, Serial No. 279,083.

The object of my invention is to provide improved means for lubricatmg the moving parts of an internal combustion engine,

.which will be both simple in, construction and efficient in operation.

My invention comprises a well formed in the crank case for the accumulation of oil and a pump, in the case, driven from the engine crank shaft, whereby the oil is delivered through a sight feed to the desired parts. At the same time the usual oil level is carriedv in'the crank case and the oil churned into mist bythe cranks. An air current is provided whereby the oil mist is carried to and deposited onthe valve op- V crating mechanism andall other parts in its path; My invention also comprises other structural features which arehereinafter .fully described; 1

In order that my'invention may be fully understood, it is deemed; advisable to' describe fully the casing or housing fo'rthe engine, which is the subject-matter of the claims of the aforementioned application of which this is a division.

Figure '1 is a general View "of the main" castings, shown in perspective andv sepa-y rated from each other.

Fig. 2 is a vertical cross-section taken through one of the cylinders showing in general the main parts only.

'Fig, *3 is a similar cross-section taken through the hood containing the pump drives, etc.

The main casting a, forming the crank and gear casing, is of generally cylindrical form with the front sliced away longitudinally as shown in Fig. 1. The top of this casing is'flattened as at b, to which the cyl- Specification of LettersPatentQ and this application filed The crank shaft is formed between bearings c with the usual integral cranks for actuation from the cylinders and extends only a short distance at both ends beyond the end bearings. At its forward end'the shaft carries a fly wheel, not shown, located in the circular open end of the main casing and arranged to circular end cover f.

Attheopposite end the casing forms a compartment g between its end wall and the after bearing 6 in which is'located the reverse gearing, etc. At this end the crank shaft is provided with a flanged coupling (not shown) right next to the bearing, and by this coupling connects with an extension which operates the reverse gearsand passes on ut the rear of the compartment where it is supported inbearings in a bonnet 71 arranged to be bolted to the end of casing a.

The entire open front of the casing is flanged and arranged to be closed by a singlefro-nt plate i. The cylinder castings c, 0 have open front compartments for containing the valve operative'cams j, and also carry the bearings 70 for the cam shaft. These compartments are. flanged in alinement with the'flange on the'front of easing a; so that they are also closed by front plate i which is' provided with projections Z for covering these compartments. 1

The crank compartments in casing a between bearings e are each provldedat the back with an air inlet m as shown in Fig. 2.

As shown in this figure,the valve operating mechanism is indicated at%, and it is com-' pletely inclosed at the top by light casing 0. From this casing a pipe p leads to the suction of the vaporizer g and thence tothe inlet passage 7' in the cylinder head.

The operation is as follows: The cranks s dip 'into a bath of oil in the bottom of the casing, and in their rapid rotation churn the oil into a mist or spray which permeates the whole interior of the casing and cylin Patented Sept. 27,1921. Original application filed February 25, 1919, Serial No. 279,083. Divided I September 11, 1919. Serial. No. 323,181.

be entirely inclosed by the end of arm '6 of rocker w.

gets heated, to the mixing chamber of the carbureter, on itsway lubricating the cams and valve mechanism.

The end compartment g'carriesgearingit for operating the cam shaft u,see Fig. 32

On the shaft of one of these gears is con'' veniently mounted an eccentric o for actuating the rocker w for voperating the pumps 00, 3 and 2;. as representing the air pump,- 9 the pump for supplying, water to the cooling jackets, and a apump for removing the bilge water. i

As will be seen in the drawing, the front plate '5, where it covers this portion of the casing, is dished out and carries pumps g and 2 on its face, operable by a single plunger 5" which is actuated by the slotted The air pump m is operated by a link 7 connected with an other'arm of rocker w".

Rocker w also operates the oil pump 8 in the following manner: At this point the casing iscut out at the bottom, as shown at 9, and the dished portion of the front plate '11 is ex tendedjdown to meet it and form therein an oil pocket or well 10. Into this pocket extends oil pump 8 which is mounted to slide on a fixed plunger 11 comprising a pipe carrying at its lower end inlet valve 12 and at its upper end connecting with-the sight feed arrangement v13, from which a tube 1 provides lubrication for the gearing t'an'd other mechanism in hood d' and another tube 15 leads to the forward end of the engine, where oil'overflows variouscdivisions in the crank case, finally returning-to the bath in the bottom of the casing.

Pump 8 carries an inlet valve 16 at its lower end and is operated to raise and lower upon pipe 11 by means of a pin 17 on rocker wybeln-g held thereon by a spring 18 abutting against a collar on the pipe; .The action of the pump is as follows: As the rocker is turned to lower pin 17, spring 18 forces pump 8 down into the oil in well 10, and oil enters inlet valve 16. Upon the upstroke of the rocker, pin 17 raises the pump and the oil contained in its lower end is forced through valve 12 into pipe 11. As this is a continuous process, a certain quantity of oil is keptcirculating through pipes 14, 15, as can be ascertained, by the vsight feed 13.

The sight feed 13 may be replaced by a pressure gage and the oil sent, under pressure, from the pump to the crank shaft bearings, thence through a hollow crank shaft to the crank pin bearings. Excess oil will be thrown out of these bearings and form a mist of oil inthe case, which will be picked up and distributed by the air current asv above described.

The advantages of this arrangement are that a great deal is accomplished by a very few parts; A single eccentric operates the four pumps,thelubrication of every moving part is provided from a single oil delivery pipe, and complete accessibility is affordedto each pump without disturbing'any other working part.

Having now fully described my invention, what Iclaim and desire to protect by Letters Patent is: r

In an internal combustion engine, the combination with the cylinders and moving parts includin the crank shaft, of mechanism driven from the crank shaft, an oil pump, driven from said mechanism,-said pump including a fixed hollow piston up through which the oil is forced and a; movable cyl'inder, and means to distribute the oil forced from the upper'part of the piston to working parts of the engine,

2. In an internal combustion engine, the combination with the cylinders and moving parts including the crank shaft, of mechanism driven from the crankshaft, an oil pump, driven from said 'mechanism, said pump including. a fixed vertical pipe vup through which the oil is forced, means to incloSe said driving mechanism and oil pump, a removable sight feed "at the top of the oil pump and supporting the same whereby by lifting thesight feed the oil pump may be withdrawn, and oil distributing means connected with thesight feed.

'3. In" an internal combustion engine, the

combination with the cylinders and moving the casing and inclosing the pump on three sides. I a.

4. In an internal combustion engine, the

combination with the cylinders and movingparts including the crank shaft, of mechanism driven from the crank shaft, an oil pump driven by said mechanism, and a fixed vertical delivery pipe extending interiorly of and forming an element of said oil' pump and delivering oil therefrom.

5.111 an internal combustion engine, the combination with the cylinders and moving parts including the crank shaft, of mechanism driven from the crank shaft, an oil pump in driven relation with said mecha- 6. In an internal combustion engine, thecombination with the cylinders and moving parts including the crank shaft, of mechanism driven from the crank shaft, an oil pump operable from said driven mechanism, said pump comprising telescoping tubes, valves at the lower ends of the tubes, means to actuate one of said tubes in one direction from the driven mechanism, and means independent of the driven mechanism to actuate said tube in the opposite direction.

7. In an internal combustion engine, the combination with the cylinders and moving parts including the crank shaft, of mechanism driven from the crank shaft, a vertically extending oil pump operable from sait driven mechanism, said pump comprising telescoping tubes, valves on the lower ends of the tubes, collars on the tubes, a spring between the collars, means to posi:

tively actuate one of said tubes in one direction from the driven mechanism, the spring operating such tube in the opposite direction.

8. In an internal combustion engine, the combination with the cylinders and moving parts thereof including the crank shaft, of

an open faced housing for inclosing the,

moving parts, a cover for the opening in said housing, a pocket 1n sald cover forming an oil well, a pump extending into said oil well, an eccentric on the shaft, an arm adapted to be rocked by said eccentric, means for operating the pump from the arm, and means to lead the pumped oil to the moving parts of theengine.

9. In a lubricating system for an internal combustion engine having a crank case, there being an oil well in the crank case, a pump having a fixed hollow plunger and a movable cylinder, valves in the plunger and the cylinder, actuating connections between the pump cylinder and the engine, an oil reservoir in communication with the upper end of the hollow plunger, leading from said reservoir to the engine parts for conveying oil thereto.

In testimony of which invention, I have hereunto set my hand, at Wilmington, Del., on this 28th day of Au ust, 1919.

ELEUTI-IERE I AUL DU PONT.

and oil feed pipes 

